• Magnetic study above the curie temperature of γ-Fe2O3 in determining the dispersion nature of Co2+ ions in Co-modified γ-Fe2O3 thin films

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      https://www.ias.ac.in/article/fulltext/boms/018/08/0989-0996

    • Keywords

       

      Co-modifiedγ-Fe2O3 thin films; MOCVD; curie temperature; magnetocrystalline anisotropy; uniaxial anisotropy

    • Abstract

       

      Gamma (γ) iron oxide thin films containing 6 at% of cobalt atoms selectively dispersed at interstitial and octahedral locations have been prepared by a reactive chemical vapour deposition process. Such dispersion gives microscopic Co-trapped and Co-doped regions inγ-Fe2O3 matrix and introduces magnetocrystalline anisotropy leading to high coercivity values of 64–112 kA/m. Temperature dependence of coercivity and saturation magnetization forγ-Fe2O3 films confirm the dispersion model.

    • Author Affiliations

       

      B K Das1 Sandip Dhara1 A C Rastogi1

      1. Materials Division, National Physical Laboratory, Dr K S Krishnan Marg, New Delhi - 110012, India
    • Dates

       
  • Bulletin of Materials Science | News

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